Nexo NXAMP4X1, Service Manual

Page: 53 / 123

NXAMP4x1
53
3. Operation
3-1. Entry of the test program
While holding down the [SELECT4], [MUTE4] and [A]
buttons simultaneously, turn the power switch on. The start
up screen appears on the LCD.
Start Up Screen
Boot 1.00
WAIT...
Then release your fingers from the buttons.
The test program starts and the test menu screen ap-
pears on the LCD.
Test Menu Screen
00 CHOOSE TEST < >
01 SWITCH
3-2. Executing the test and judgment display
Select the desired test item from the table below using
the rotary encoder, and press the [B] button to start the
test.
Test Program List
01
02
03
04
05
06
07
08
09
10 SWITCH
ENCODER
LED
LCD
RS232
GPI
PORT (no use)
DSP
WORD CLOCK
12C 11
12
13
14
15
16
17
18
19 FLASH
FAN
SLOT
ATTENUATION
ANALOG
BRIDGE
CALIBRATION
STANDBY
QUIT
After executing the test, the display returns to the test
menu screen if the test result is OK. If an error occurs,
“ERROR” appears on the LCD and the test program is
stopped. In this case, turn the power switch off and on
again as was done above in 3-1.
4. Outline of tests
4-1. SWITCH test
00 CHOOSE TEST < >
01 SWITCH
Press the [B] button to start the test. The LCD shows one
by one the switch name to be tested as shown below.
01 SWITCH
HIT SELECT CH1
Press the switch displayed on the LCD as instructed.
If all instructed switches are OK, the display automati-
cally returns to the test menu screen.
4-2. ENCODER test
00 CHOOSE TEST < >
02 ENCODER
Press the [B] button to start the test, and the following
display appears.
02 ENCODER
TURN RIGHT 0
Turn the ENCODER knob clockwise. The 2nd line on the
display changes as shown below.
TURN RIGHT 0 –> • • • • • –> TURN RIGHT 19
The following display appears after the 2nd line on the
display reaches TURN RIGHT 19.
02 ENCODER
TURN LEFT 0
Turn the ENCODER knob counterclockwise. The 2nd line
on the display changes as shown below.
TURN LEFT 0 –> • • • • • –> TURN LEFT 19
The display returns to the test menu screen after the 2nd
line on the display reaches TURN LEFT 19.
4-3. LED test
00 CHOOSE TEST < >
03 LED
Press the [B] button to start the test, and the following
display appears.
03 LED
The LEDs automatically light up one by one in a specific
order as shown on the next page.
All LEDs will light at the same time after each LED indi-
vidually has been tested. Confirm that each LED is lit
normally. If OK, press the [B] button to return the display
to the test menu screen.